4-Bit/8-Bit MCU

The AVR core combines a rich instruction set with 32 general purpose working registers. All 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in a single instruction, executed in one clock cycle. The resulting architecture is compact and code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers.

• High Performance, Low Power Atmel® AVR® 8-bit Microcontroller
  • Advanced RISC Architecture
  • 123 Powerful Instructions --Most Single Clock Cycle Execution
  • 32 x 8 General Purpose Working Registers
  • Fully Static Operation
  • Up to 20 MIPS Throughput at 20 MHz
• Non-volatile Program and Data Memories
  • 8K Bytes of In-System Programmable Flash Program Memory
  • Endurance: 10,000 Write/Erase Cycles
  • 256 Bytes of In-System Programmable EEPROM
  • Endurance: 100,000 Write/Erase Cycles
  • 512 Bytes Internal SRAM
  • Optional Boot Code Section with Independent Lock Bits
  • Data Retention: 20 Years at 85oC / 100 Years at 25oC
• Peripheral Features
  • One 8-bit and one 16-bit Timer/Counter with Two PWM Channels, Each
  • Programmable Ultra Low Power Watchdog Timer
  • On-chip Analog Comparator
  • 10-bit Analog to Digital Converter
  • 28 External and 4 Internal, Single-ended Input Channels
  • Full Duplex USART with Start Frame Detection
  • Master/Slave SPI Serial Interface
  • Slave I2C Serial Interface
• Special Microcontroller Features
  • Low Power Idle, ADC Noise Reduction, and Power-down Modes
  • Enhanced Power-on Reset Circuit
  • Programmable Brown-out Detection Circuit with Supply Voltage Sampling
  • External and Internal Interrupt Sources
  • Pin Change Interrupt on 28 Pins
  • Calibrated 8MH--Oscillator with Temperature Calibration Option
  • Calibrated 32kH--Ultra Low Power Oscillator
  • High-Current Drive Capability on 8 I/O Pins
• I/O and Packages
  • 32-lead TQFP, and 32-pad QFN/MLF: 28 Programmable I/O Lines
• Speed Grade
  • 0 --2 MH--@ 1.7 --1.8V
  • 0 --4 MH--@ 1.8 --5.5V
  • 0 --10 MH--@ 2.7 --5.5V
  • 0 --20 MH--@ 4.5 --5.5V